Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield
Currently applied fisheries models and stock assessments rely on the assumption that density-dependent regulation only affects processes early in life, as described by stock–recruitment relationships. However, many fish stocks also experience density-dependent processes late in life, such as density...
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ftdtupubl:oai:pure.atira.dk:publications/4bf15511-1cec-458d-98b4-5666e28f0ad2 2024-06-23T07:55:28+00:00 Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield van Gemert, Rob Andersen, Ken Haste 2018 application/pdf https://orbit.dtu.dk/en/publications/4bf15511-1cec-458d-98b4-5666e28f0ad2 https://doi.org/10.1093/icesjms/fsx236/4817093 https://backend.orbit.dtu.dk/ws/files/185298034/fsx236.pdf eng eng https://orbit.dtu.dk/en/publications/4bf15511-1cec-458d-98b4-5666e28f0ad2 info:eu-repo/semantics/openAccess van Gemert , R & Andersen , K H 2018 , ' Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield ' , ICES Journal of Marine Science , vol. 75 , no. 4 , pp. 1296–1305 . https://doi.org/10.1093/icesjms/fsx236/4817093 Density dependence Maximum sustainable yield Selective fishing Size spectrum /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2018 ftdtupubl https://doi.org/10.1093/icesjms/fsx236/4817093 2024-06-11T14:47:43Z Currently applied fisheries models and stock assessments rely on the assumption that density-dependent regulation only affects processes early in life, as described by stock–recruitment relationships. However, many fish stocks also experience density-dependent processes late in life, such as density-dependent adult growth. Theoretical studies have found that, for stocks which experience strong late-in-life density dependence, maximum sustainable yield (MSY) is obtained with a small fishery size-at-entry that also targets juveniles. This goes against common fisheries advice, which dictates that primarily adults should be fished. This study aims to examine whether the strength of density-dependent growth in actual fish stocks is sufficiently strong to reduce optimal fishery size-at-entry to below size-at-maturity. A size-structured model is fitted to three stocks that have shown indications of late-in-life density-dependent growth: North Sea plaice (Pleuronectes platessa), Northeast Atlantic (NEA) mackerel (Scomber scombrus), and Baltic sprat (Sprattus sprattus balticus). For all stocks, the model predicts exploitation at MSY with a large size-at-entry into the fishery, indicating that late-in-life density dependence in fish stocks is generally not strong enough to warrant the targeting of juveniles. This result lends credibility to the practise of predominantly targeting adults in spite of the presence of late-in-life density-dependent growth. Article in Journal/Newspaper Northeast Atlantic Technical University of Denmark: DTU Orbit Marine Biology 164 10 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Density dependence Maximum sustainable yield Selective fishing Size spectrum /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Density dependence Maximum sustainable yield Selective fishing Size spectrum /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water van Gemert, Rob Andersen, Ken Haste Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield |
topic_facet |
Density dependence Maximum sustainable yield Selective fishing Size spectrum /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Currently applied fisheries models and stock assessments rely on the assumption that density-dependent regulation only affects processes early in life, as described by stock–recruitment relationships. However, many fish stocks also experience density-dependent processes late in life, such as density-dependent adult growth. Theoretical studies have found that, for stocks which experience strong late-in-life density dependence, maximum sustainable yield (MSY) is obtained with a small fishery size-at-entry that also targets juveniles. This goes against common fisheries advice, which dictates that primarily adults should be fished. This study aims to examine whether the strength of density-dependent growth in actual fish stocks is sufficiently strong to reduce optimal fishery size-at-entry to below size-at-maturity. A size-structured model is fitted to three stocks that have shown indications of late-in-life density-dependent growth: North Sea plaice (Pleuronectes platessa), Northeast Atlantic (NEA) mackerel (Scomber scombrus), and Baltic sprat (Sprattus sprattus balticus). For all stocks, the model predicts exploitation at MSY with a large size-at-entry into the fishery, indicating that late-in-life density dependence in fish stocks is generally not strong enough to warrant the targeting of juveniles. This result lends credibility to the practise of predominantly targeting adults in spite of the presence of late-in-life density-dependent growth. |
format |
Article in Journal/Newspaper |
author |
van Gemert, Rob Andersen, Ken Haste |
author_facet |
van Gemert, Rob Andersen, Ken Haste |
author_sort |
van Gemert, Rob |
title |
Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield |
title_short |
Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield |
title_full |
Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield |
title_fullStr |
Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield |
title_full_unstemmed |
Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield |
title_sort |
implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield |
publishDate |
2018 |
url |
https://orbit.dtu.dk/en/publications/4bf15511-1cec-458d-98b4-5666e28f0ad2 https://doi.org/10.1093/icesjms/fsx236/4817093 https://backend.orbit.dtu.dk/ws/files/185298034/fsx236.pdf |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
van Gemert , R & Andersen , K H 2018 , ' Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield ' , ICES Journal of Marine Science , vol. 75 , no. 4 , pp. 1296–1305 . https://doi.org/10.1093/icesjms/fsx236/4817093 |
op_relation |
https://orbit.dtu.dk/en/publications/4bf15511-1cec-458d-98b4-5666e28f0ad2 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/icesjms/fsx236/4817093 |
container_title |
Marine Biology |
container_volume |
164 |
container_issue |
10 |
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1802648082423218176 |